. Bulletin - United States National Museum. Science. FiG. 181.—Hemipheagma macxjlattjm. a, a feagment, x2, ExmBiTmG portions of two macule;; 6, TANGENTIAL SECTION, X20, THROtTGH THE INTEEMACULAR ZOCECIA; C, SEVERAL ZOCECIA OF THE SAME SECTION, X40; d, VERTICAL SECTION, X20, THROUGH THE ENTIRE WIDTH OF A BRANCH. KUCKEES SHALE (C2), Reval, Esthonia. walled zooecia with numerous very minute angular mesopores, will readily serve for the identification of H. maculatum. The incom- plete diaphragm, crenulated walls, and small mesopores are especially characteristic of tliin sections. Occurrence.—Not
. Bulletin - United States National Museum. Science. FiG. 181.—Hemipheagma macxjlattjm. a, a feagment, x2, ExmBiTmG portions of two macule;; 6, TANGENTIAL SECTION, X20, THROtTGH THE INTEEMACULAR ZOCECIA; C, SEVERAL ZOCECIA OF THE SAME SECTION, X40; d, VERTICAL SECTION, X20, THROUGH THE ENTIRE WIDTH OF A BRANCH. KUCKEES SHALE (C2), Reval, Esthonia. walled zooecia with numerous very minute angular mesopores, will readily serve for the identification of H. maculatum. The incom- plete diaphragm, crenulated walls, and small mesopores are especially characteristic of tliin sections. Occurrence.—Not uncommon in the Kuckers shale (C2) at Reval, and Baron Toll's estate, Esthonia. Eolotype.—Cat. No. 57428, British Museum, thin section of the type-specimen. HEMIPHRAGMA BATHERI, new species. Text fig. 182. The zoarium of this well-marked species is of small, frequently branching, cyhndrical stems averaging 2 mm. in diameter. The sur- face is smooth and presents no conspicuous maculae, as in the preced- ing species, although clusters of larger zooecia and more numerous mesopores are present as usual. Zooecia polygonal, thick-walled, with solid interzocEcial spaces; fi,ve to six zooecia in 2 mm. Acanthopores small, sometimes numerous at the surface where they occur along the crest of the zocecial wall. Mesopores few, averaging about one to a zooecium, usually filled by the dense tissue forming the solid interzooe- cial spaces. Through this tissue the outlines of the mesopores are visible in thin Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original United States National Museum; Smithsonian Institution; United States. Dept. of the Interior. Washington : Smithsonian Institution Press, [etc. ]; for sale by the Supt. of Docs. , U. S. Govt Print. Off.
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